Spray nozzle



y 1954 H. A. CARTWRIGHT 2,683,062

SPRAY NOZZLE Filed Nov. 22, 1950 INVENTOR. HORACE A. CARTWRIGHT ATTORNEYS Patented July 6, 1954 UNITED STATES PATENT OFFICE SPRAY NOZZLE Horace A. Cartwright, Minneapolis, Minn.

Application November 22, 1950, Serial No. 197,025

11 Claims. (01. 299-139) This invention relates to spray nozzles. More particularly, it relates to spray nozzles constructed and arranged for the application of liquids of a rather viscuous nature to relatively flat surfaces such as roads. I

In the distribution of liquids of a viscuous nature, and. especially in road building, it is highly important that the liquid be distributed uniformly and at the proper rate in order to form a smooth, even surface substantially free of overlaps, skips, and heavy spots. It is also important, if at all possible, in order to facilitate the ap-- plication of such materials and thereby accomplish the same with a maximum of efficiency "and a minimum of time consumption, that the start and finish lines extend transversely to the direction of the spraying operation, and that these finish lines form a straight line.

In the past, it has been found to be advantageous in the application of such materials in order to prevent skips and heavy spots and thus insure a uniform application, to apply such materials by arranging the spray nozzles through which the material is forced so as to form staggered spray fans and thus avoid interference of the fans with each other. These staggered spray fans are considered staggered in that the respective fans are oriented parallel to each other, but at an angle to the direction of the spraying operation. Thus it is possible to have each spray nozzle overlap one-half the area covered by its two adjacent nozzles and thereby insure an even application of the viscuous material. The difficulty with such an arrangement, however, is that the starting and finishing lines formed as a result of this orientation'of the spray fans, have always presented a jagged outline in contrast to what is desired, namely, a straight line. This is especially annoying when it is necessary to finish the application of the materials against the side of a sidewalk or curb. My invention is directed towards the elimination of such jagged finish lines.

A general object of my invention is to provide a novel and improved spray nozzle of cheap and simple construction and of improved efiiciency.

A more specific object is to provide a spray nozzle capable of producing a straight starting and finishing line which is normal to the direction of the spraying operation.

Another object is to provide a spray nozzle capable of being mounted and arranged on a transverse spray bar to form, in conjunction with similar spray nozzles, a plurality of staggered spray fans to permit the even application of a viscuous fluid thereby, and nevertheless being capable of forming a straight starting or finishing line normal to the direction of the spraying operation as a result of the flow being shut off or turned on by these nozzles.

A further object is to provide a spray nozzle capable of forming a straight starting or finishing line arranged transversely with respect to the direction of the spraying operation and at the same time capable of forming such a line without an excessive application of the viscuous material along that line.

These and other objects and advantages of my invention will more fully appear from the following description made in connection with the accompanying drawings whereinlike reference characters refer to the same or similar parts throughout the several views and in which:

Figure l is an exploded view of one embodiment of my invention.

Figure 2 is a vertical sectional View taken along line 22 of Figure 1.

Figure 3 is a vertical, sectional view taken along line 33 of Figure 2.

Figure 4 is a vertical sectional view taken along line 4-4 of Figure 3.

Figure 5 is a bottom plan view of a plurality of spray nozzles embodying my invention shown in open position and forming staggered and overlapping spray fans.

Figure 6 is a bottom plan view of one embodiment of my invention approaching closed position.

Figure 7' is a bottom plan view of a similar embodiment of my invention disposed in closed. position.

Figure 8 is a diagrammatical View of \the finish line normally formed by spray bars wherein overmore desirable starting and finishing lines formed by one embodiment of my invention and showing the manner in which the spray fans swing to form such a straight line.

One embodiment of my invention may include, as shown in Figures 1-7, a head I0, one end portion of which is shaped to form a disc I l and the other end portion of which is formed into a conduit [2, the outer end of which has external threads l3 as shown in Figure 1. These threads 13 are of equal pitch and depth with respect to internal threads which are formed in apertures 14 of the spray bar I5. These apertures M are spaced regularly along the length of the spray bar [5, and the spray bar is normally arranged transversely with respect to the direction of the spraying operation, indicated by an arrow in Figure 5. The conduit portion 12 has a passage l which extends therethrough and terminates at the fiat lower surface H of the disc N. This passage I6 is disposed centrally of the conduit portion I2 and terminates centrally with respect thereto at a point slightly inward from the periphery of the disc Formed through the center of the disc H is a centrally disposed and internally threaded aperture l8 which extends vertically through the disc.

A control member |9 having a flat upper face 2|] is secured beneath the disc [I with the two races held in flat registering relation by means of a compression bolt 2| which extends upwardly through a central aperture 22 formed within the control member H3. The bolt 2| has external threads 23 which cooperate with the internal threads of the passage l8 to hold the head l9 and the control member IS in compressed relation. A compression-type spring 24 is carried by the bolt 2| to constantly urge the two flat surfaces, I1 and 20, toward each other.

The control member l9 has a lever arm 25 extending outwardly and radially therefrom. An aperture 26 is formed in the outer end of the lever arm 25 to receive a bolt or rivet 2? which connects the same to a gang control bar 28 as best shown in Figure 5.

Formed in the lower surface of the control member I9 is a milled spray slot 29 which has vertical side walls 30 and arcuately shaped end walls 3| as best shown in Figure 3. This milled slot 29 communicates with the upper surface 520 of the control member H! by means of a, short fluid passage 32. This short fluid passage 32 extends vertically from the upper portion of the spray slot 29 to the upper surface 20 and is disposed centrally with respect to the length of the slot 29. The slot 29 is arranged obliquely with respect to the radius of the control member or disc l9 and the fluid passage 32 is arranged so as to communicate with the passage l6 when the control member i9 is moved to open position. A small portion of the metal material of the upper surface 26 surrounding the passage 32 is dished out as best shown in Figure 1 and Figure 4.

To assemble my spray nozzle, the bolt 2| is inserted through the spring 24 and through the aperture 22 of the control member is from below and then threaded into th aperture l6 of the head II). By tightening the bolt 2|, the head l0 and the control member l9 are compressed tightly together so that the two flat surfaces ll and 20 will register in close tight-fitting relation to prevent escape of any of the fluid which may be forced through the passage It. Thereafter, each of the nozzles is mounted on the spray bar I5 as best shown in Figure 5 and connected to the gang control bar 28. Each of the apertures I4 in the spray bar l5 are carefully formed so as to extend normal to the length of the spray bar. When the gang control bar is moved so that each of the slots 29 of the control member l9 has been moved to open position with respect to the passage IS, the spray fan will emanate from each of the slots in staggered relation with respect to each other. Actually, the spray fans will be parallel, but each will be oriented at an angle to the direction of the spraying operation.

In operation, the respective spray slots of each nozzle will cause the spray fans to spread below the same in staggered and overlapping relation, as best shown in Figure 5. This relation has been found to be highly desirable in applying an even layer of such viscuous materials, but no previously known spraying mechanism constructed to apply such materials in this manner could form a straight finish line. All previously known spraying mechanism, when arranged to provide staggered spray fans, terminate the spraying operation with a jagged finish line such as is shown in Figure 8. However, with a spray bar having nozzles constructed in accordance with my invention, the starting and finishing line is straight. As the control bar 28 is swung toward partially closed position as shown in Figure 6, the amount of viscuous material which can be forced outwardly through the passage [6 is considerably diminished. At the same time, the slot is thus swung to a position normal .to the direction of the spraying operation as shown in Figure 6. The swinging of the spray slot 25 to a position normal with respect to the direction of the spray'n operation will cause the spray fan to be swung accordingly, and to form, in conjunction with the other spray nozzles, a straight finish line such as is shown in Figure 9. Because the amount of viscuous material which can be forced through the nozzle has been reduced by the swinging of the control member to the position shown in Figure 6, there will be no heavy spots formed along the finish line and thus there will be no running of the viscuous material across the surface being sprayed.

When the operator of the spraying machine wishes to commence the spraying operation, the gang control bar 28 is swung so as to move the control members Is to the open position shown in Fi ure 5. The starting line, which is formed as a result of the opening of the control member, will be a straight line such as shown in Figure 9, since the spray fans, which will be formed when the control members :9 move toward open position, will swing in the reverse of the manner described above. In other words, a straight starting line will be formed, and immediately thereafter the spray fans will swing from a transverse 'position with respect to the direction of the spraying operation to an obliquely angled position such as is shown in Figure 5.

Figure 7 shows the position of the control member is and the spray slot 23 when the control member has been moved to closed position.

The spray slot as is then oriented at an angle to the direction of the spraying operation. At first glance it might appear that the finish line would, as a result of the closed position of the spray slot 2? be formed at an angle to the direction of the spraying operation. This is not the case, however, since the action through which the control members i S are moved from open to closed position or vice versa, is a fairly rapid action and this rapid action, coupled with the viscuous nature of the spray materials, will cause the finish line to be oriented normal to the direction of the spraying operation. In other words, the spray fan will normally be cut off approximately at the time the spray slot 29 reaches the position shown in Figure 6.

Thus it can be seen that I have provided a spray nozzle constructed to facilitate spraying operations adjacent curbs, sidewalks, etc. where a straight finish line or starting line is imperative. Moreover, a plurality of spray nozzles constructed in accordance with my invention can be operated in the conventional and highly desirable relation wherein they are disposed to provide staggered spray fans which overlap each other and yet are capable of forming astraight' starting and finishing line which is normal to the direction of the spraying operation.

It should be noted that a spray bar equipped with a plurality of nozzles constructed in accordance with my invention and arranged as shown herein is capable, not only of forming a straight starting and finishing line, but is also capable of forming such a line without permitting an excessive application of the viscuous material along that line.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts without departing from the scope of my invention.

What I claim is:

1. A spray nozzle comprising a body having a feed passage with an inlet and an outlet formed therein, said body being adapted to be mounted on a spray bar or the like to connect said passage with a fluid source, and a rotating member secured to said body in tight fitting relation across said outlet and having a substantially flat outer surface, said rotating member having an elongated vertically side-walled slot the central portion only of-which registers with the outlet of said feed passage in open position, said slot forming at its central portion only a passage through said rotating member and directing fluid forced through said passages into a spray fan formation.

2. A spray nozzle comprising a pair of nonporous'bodies having opposed flat registering surfaces and being held tightly together for rotation with respect to each other, one of said bodies having a passage with an inlet and an outlet extending therethrough and being adapted to have the inlet of said passage connected to a fluid source, and the other of said bodies having an elongated slot with curved end walls formed therein and positioned eccentrically and communicating directly with the outlet of said passage with its central portion only when said other body is disposed in open position with respect to said outlet, said slot forming into a spray fan any liquid forced under pressure through said outlet and said slot while in open position to cause the liquid to be sprayed along a substantially straight line.

3. A spray nozzle comprising a pair of nonporous bodies having opposed flat registering surfaces and being tightly connected together for rotation with respect to each other, one of said bodies having a passage with an inlet and an outlet extending therethrough and being adapted to have the inlet of said passage connected to a fluid source, and the other of said bodies having an elongated eccentrically disposed straight slot formed in its outer surface and communicating first via its central portion with the outlet of said passage when said other body is disposed in open position with respect to said first mentioned body, said slot having vertical side walls and being disposed obliquely to the direction of the spraying operation when in open position and being disposed at substantially right angles to the direction of the spraying operation when approaching closed position whereby the spray fan normally formed by said slot in a fluid being forced under pressure through said passage and outwardly through said slot, will be caused to swing to a position substantially perpendicular to the direction of the spraying operation when said other body is moved to closed position and to thereby form a straight finish line when the spraying operation is terminated.

4. The structure defined in claim 2, said bodies being arranged for rotation on a common axis.

5; A spray nozzle comprising a pair of nonporous discs having opposed flat registering surfaces and being tightly connected together for rotation with respect to each other, one of said,

discs having a passage with an inlet and an outlet extending therethrough and being adapted to have the inlet of said passage connected to a fluid source, and the other of said discs having a substantially'vertical slot formed in its nonregistering fiat surface and extending through said disc at a point centrally of the length of said slot to communicate with the outlet of said passage when said other disc is rotated to open position with respect to said outlet, said slot having straight sidewalls and being disposed obliquely to the direction of the spraying operation when in open position and being disposed substantially normal to the direction of the spraying operation when approaching closed position whereby the spray fan normally formed by a fluid being forced under pressure through said passage and outwardly through said slot may be caused to swing to a position substantially normal to the direction of the spraying operation when said other disc is moved to closed position and to thereby form a straight finish line when the spraying operation is terminated.

6. A spray nozzle comprising a pair of discs having opposed flat registering surfaces, means for connecting said discs together tightly for rotation with respect to each other, one of said discs having a passage with an inlet and an outslot being disposed obliquely to the direction of q the spraying operation when in open position and being disposed substantially normal to the direction of the spraying operation when approaching closed position whereby the spray fan normally formed by a fluid forced under pressure through said passage and outwardly through said slot, will be caused to swing to a, position substantially normal to the direction of the spraying operation when said other disc is moved to closed position and to thereby form a straight finish line when the spraying operation is terminated.

7. A spray nozzle comprising a pair of bodies having opposed flat registering surfaces and being tightly connected together for rotation with respect to each other, one of said bodies having a passage with an inlet and an outlet extending therethrough, and being adapted to have the inlet of said passage connected to a fluid source and the other of said bodies having an upright straight slot formed in its outer surface and cornmunicating with the outlet of said passage when said other body is disposed in open position with respect to said first mentioned body, said communication being established by an orifice formed in the flat registering surface of said second mentioned body and centrally of the length of said slot, said orifice being substantially equal in diameter to the diameter of said outlet and being centrally disposed with respect to the upper portion of said slot, said slotted body being swingable to open and closed position, said slot being disposed obliquely to the direction of the spraying operation when in open position and being disposed substantially normal to the direction of the spraying operation when approaching closed position whereby the spray fan normally formed by fluid being forced under pressure through said passage and outwardly through said slot will be caused by said slot to swing to a position substantially normal to the direction or the spraying operation when said body is moved to closed posi tion and to thereby form a straight finish line when the spraying operation is terminated.

8. A spray nozzle comprising a pair of nonporous bodies having opposed flat registering surfaces and being tightly connected together for rotation with respect to each other, one of said bodies having a passage with an inlet and an outlet extending therethrough and being adapted to have the inlet of said passage connected to a fluid source, and the other of said bodies having a straight slot with straight and parallel vertical side walls formed therein and communicating at its central portion taken longitudinally with the outlet of said passage when said other body is disposed in open position with respect to said first mentioned body, said slot being disposed obliquely to the direction of the spraying operation when in open position and being disposed substantially normal to the direction of the spraying operation when approaching closed position whereby the spray fan normally formed by a fluid being forced under pressure through said passage and outwardly through said slot, will be caused by said slot to swing to a position substantially normal to the direction of the spraying operation when said other body is moved toward closed position and to thereby form a straight finish line when the spraying operation is terminated.

9. A spray nozzle comprising a pair of nonporous bodies having opposed flat registering surfaces and being tightly connected together for rotation with respect to each other, one of said bodies having a passage with an inlet and an outlet extending therethrough and being adapted to have the inlet of said passage connected to a fluid source, and the other of said bodies having a flat non-registering surface with a straight slot formed therein communicating centrally of its length with the outlet of said passage when said other body is disposed in open position with respect to said first mentioned body, said slot having vertical and straight side walls and being substantially greater in length than the diameter of said outlet, said slot being disposed obliquely to the direction of the spraying operation when in open position and being disposed substantially normal to the direction of the spraying operation when approaching closed position whereby the spray fan normally formed by said slot in a fluid being forced under pressure through said passage and outwardly through said slot Will be caused to swing to a position substantially normal to the direction of the spraying operation when said other body is moved to closed position and to thereby form, when arranged transversely with respect to the direction of the spraying operation with a plurality of similarly constructed spray nozzles, a straight finish line as the spraying operation is terminated.

10. A spray nozzle comprising a pair of discs having opposed fiat registering surfaces, means for tightly connecting said discs together for rotation on a common axis, one of said discs having a passage with an inlet and an outlet extending therethrough and being adapted to be mounted on a spray bar to connect said inlet with a fluid source, and the other of said discs having a vertically side-walled straight slot formed therein and communicating midway its length with the outlet of said passage when said other disc is disposed in open position with respect to said first mentioned disc, said communication being accomplished by an orifice extending downwardly from the flat registering surface of said other disc to the medial longitudinal portion of said slot, said orifice being disposed centrally of said slot and communicating with the upper portion thereof, the side walls of said slot being straight and spaced a distance apart less than the diameter of said outlet, said slot being greater in length than the diameter of said outlet and being arranged so as to be disposed obliquely to the direction of the spraying operation when in open position and to be disposed substantially normal to the direction of the spraying operation when approaching closed position, whereby the spray fan normally formed by said slot in a fluid being forced under pressure through said passage and outwardly through said slot, will be caused to swing to a position substantially normal to the direction of the spraying operation when said other body is moved toward closed position and to thereby form a straight finish line as the spraying operation is terminated.

11. A spray nozzle comprising a pair of nonporous bodies having opposed surfaces held together for rotation relative to each other, one of said bodies having a passage with an inlet and an outlet extending therethrough and being adapted to have the inlet of said passage connected to a fluid source, the other of said bodies having a straight slot formed therein and communicating with the outlet of said passage when said other body is disposed in open position with respect to said first mentioned body, said slot being disposed obliquely to the direction of the spraying operation when in open position and being disposed at substantially right angles to the direction of the spraying operation when approaching closed position whereby the spray fan normally formed by said slot in a fluid being forced under pressure through said passage and outwardly through said slot will be caused to swing to a position substantially perpendicular to the direction of the spraying operation when said other body is moved to closed position and to thereby form a straight finish line when the spraying operation is terminated.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,310,964 Piat July 22, 1919 1,741,169 Thompson Dec. 31, 1929 1,884,475 Woodcock Oct. 25, 1932 2,380,513 Garabedian July 31, 1945 FOREIGN PATENTS Number Country Date 390,652 Great Britain Aug. 13, 1933 

